1. Oil
and Gas Lease dated March 24, 2005, a memorandum of which is
recorded in Volume 960, Page 696, Official Public Records of Val
Verde County, Texas, as amended by Agreement RE Oil and Gas Lease
dated effective as of December 12, 2008, a memorandum of which is
recorded in Volume 960, Page 696, Official Public Records of Val
Verde County, Texas (“ Lease 1 ”), by and
between Carson Ranches Limited Partnership, as Lessor, and Global
Mineral Solutions, L.P., as Lessee, covering those certain 9,989.20
acres of land in Val Verde County, Texas, more particularly
described on attached Exhibit A .

2. Oil
and Gas Lease dated effective as of August 29, 2008, and
Supplemental Agreement of even date, a memorandum of which is
recorded in Volume ___, Page ___, Official Public Records of Val
Verde County, Texas, as amended by Amendment of Oil and Gas Lease
dated effective as of October 31, 2008, recorded in Volume ___,
Page ___, Official Public Records of Val Verde County, Texas
(“ Lease 2 ”), by and between Carson
Ranches Limited Partnership, as Lessor , and Global Mineral
Solutions, L.P., as Lessee , covering those certain 3,352.10
acres of land in Val Verde County, Texas, more particularly
described on attached Exhibit A-1 .

For all purposes of this instrument,
Lease 1 and Lease 2 shall sometimes be herein referred to
collectively as the “Leases”, and the acreage covered
by both of the Leases shall sometime be herein referred to
collectively as the “Lands”.

Whereas, PRE Exploration LLC,
(formerly known as Providence Exploration LLC) as present owner and
holder of all rights of the Lessee in the Leases, has requested the
undersigned party, I. W. Carson LLC, who is the present owner of
all executive rights in the Lands, to grant an extension of the
primary term of the Leases and to amend the Leases in accordance
with the further terms and provisions set forth below.

NOW THEREFORE, for good and valuable
consideration, the receipt and sufficiency of which are
acknowledged, the undersigned do hereby AGREE that the Leases are
amended as follows:

I

Extension of Primary
Terms

The primary term of each of the
Leases is hereby extended to February 29, 2013 (the “
Extended Primary Term ”). Lessor and Lessee
agree to execute, and Lessee agrees to record, the Memorandum of
Extension and Amendment of Oil and Gas Leases attached hereto as
Exhibit Bto evidence
such extension and amendment. Lessee agrees not to record the
Memorandum of Extension and Amendment of Oil and Gas Leases until
payment to Lessor of all of the cash considerations set forth below
in Paragraph II.

II

Cash Consideration

As consideration for the execution
of this instrument by Lessor, Lessee agrees to pay Lessor the
following amounts:

A. The
sum of Five Hundred Thousand and no/100 Dollars ($500,000.00),
which shall be due and payable on or before February 29, 2010;
and

B. The
sum of Eight Hundred Thirty Four Thousand One Hundred Thirty
Dollars ($834,130.00), which shall be due and payable on or before
June 20, 2010.

Each of the Leases contains a
provision obligating Lessee to drill certain wells during the
primary terms of said Leases as more fully set forth in the Leases.
Lessor agrees to waive any obligation for Lessee to drill any wells
which have not been drilled to date under the express drilling
obligation provisions of either of the Leases, and in lieu and
exchange for such waiver, Lessee agrees to drill a minimum of two
(2) test wells on the Lands covered by either of the Leases prior
to the expiration of the Extended Primary Term, each of which must
be at least a Strawn test well (the “ Obligation
Wells ”). For the purposes of this provision, the
term “drill” shall mean that a well has been drilled to
a depth sufficient to test the Strawn formation and has either been
completed as a producer of oil and/or gas, or has been plugged and
abandoned. The drilling of the Obligation Wells shall satisfy any
and all of Lessee’s expressed and/or implied covenants or
duties, if any, to Lessor under either of the Leases with respect
to the drilling of wells during the Extended Primary
Term.

IV

Letter of Credit

Lessor is presently the holder of an
Irrevocable Standby Letter of Credit (the “ Original
LOC ”) in the principal amount of One Million
and no/100 Dollars ($1,000,

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